Exploratory study of shrinkage of the diffraction cone for the generalized BFKL pomeron

Abstract

In color dipole gBFKL dynamics, we describe the emerging gBFKL phenomenology of a subasymptotic energy dependence of the diffraction slope and discuss possibilities of testing the gBFKL predictions in exclusive photo- and electroproduction of vector mesons $V$ at HERA. A substantial shrinkage of the diffraction cone ${\gamma }^{\ast }p\to Vp$ processes from the CERN/FNAL to HERA range of energy $W$ is predicted. This subasymptotic shrinkage is faster than expected from the small slope of pomeron's Regge trajectory $α_{\Pom}'$. We point out that the diffraction slope is a scaling function of $(m_V^2+Q^2)$, what relates production of different vector mesons.

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• Color screening, absorption and ${\sigma }_{tot}^{pp}$ at LHC
• Measurement of the Pion and Photon Light-Cone Wave Functions by Diffractive Dissociation
• Non-linear BFKL dynamics: color screening vs. gluon fusion
• Color Dipole Systematics of the Diffraction Slope in Diffractive Photo- and Electroproduction of Vector Mesons
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• t-dependences of vector meson diffractive production in ep collisions
• Is It Possible to Study the Wave Function of 2S Vector Mesons at HERA ?
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